This is the ValueSet that contains codes in both Substance Administration Substitution Codes (http://fhir.ch/ig/ch-emed-epr/ValueSet/ch-emed-epr-substance-admin-substitution-code) and Substance Administration Substitution Codes (http://fhir.ch/ig/ch-emed-epr/ValueSet/ch-emed-epr-substance-admin-substitution-code).